If you have contractors visiting your home to do some work: painting, flooring, plumbing or whatever. It is important to go behind them and check the security of the area after they leave for the day. Some have been known to open windows or at the minimum unlock the window for entry later.

There have been many cases where a plumber has disabled a window alarm and then snuck into the home in the middle of the night to assault the homeowner. You cannot be too careful in your own home when others that do not live there are there working.

Even if the workers are family or friends, it could be that they opened the window to throw something out or for whatever reasons but forget to lock it back up when they closed it. This is a possible entry point for a threat.

Sliding doors, main doors, alarm systems, locks and windows: if you can gain entry into the home through it, then a threat can gain entry into the home from it. Secure those areas and ensure they remain secure for the safety of your family.